Rotary compressor.



T. R. VINZBNT & F. C. BELL.v ROTARY COMPRESSOR. APPLIOATION FILED 11110.14, 1908.

983,010. -Pand Jau 31,1911.

l?" M WITNESSES: 11 |NVENTOR-S THEoDoRE R. VlNzENr THEIR ATTO'RNEY 'of the invention. Fig. 2 is a section of the ing is a specification.

UNITED sTAtrEs PATENT primos.

. f. Tf1 THEODORE R. VINZENT AND FRED C.BELL, OF ALAMEDA? CALIFORNIA.

ROTARY COMBESSOB.

Specilloation et Letters Patent.' Appleman sled December 14,'1eos. sexisme-167,401,

To all 'whom 'it may concern:

Beit known that we, Trznonons R. VIN- zEN'r and FRED C. BELL, both citizens of the United States, residing at Alameda, in the Icounty of Alameda'and State O 'California,

haveinvented new and use-ful Improvements in Rotary Compressors, of which the follow- 'Our invention relates to rotary ice-mn. chines, and means for roducin a cooling or refrigerating atmosp 1ere or e ect.

Our object is to provide a simple, cheap, practical and 'economically-o erated machine which4 is devoid' of stu -boxes o r open connections whereby the re igerating liquid can escape, which is hermetically sealed, which can be o-erated by u novice, andwhich can be run e1tlier by hand or machinery.

The invention consists of the parts-andthe construction and combinationbf parts as hereinafter more lfully described and claimed, having reference tothe accompanying drawings, 1n which- Figure 1 is an elevation in partial section outlet valve. l A

Arepresents a compressor of any suitable size, shape and material, 2 a combined condenser and receiver, 8 the evaporator or expansion chamber, 4 the expansion coil, and 5 :x shaft whereon the' aforesaid parts are mounted, and which shaft is suitably journaled and driven from any suitable-smirce'of ower. f

The chamber of the compressor is substantially ovoidal with the double opposed cylinders (3 in which the double acting piston 7 operates. This piston is gravity-actuated through the medium of thcl weight 8 carried by the piston and the rotary :1c-tion' of the compressor. Each cylinder has an inletvalve 9 carried by itsrespectve iston, and a discharge valve `10. These va ves are" of any appropriate construction, and are so arranged that on each reciprocation of the pis- 'ton'memben gas fromthe compressor willbe drawn into one of the cylinders 6 through suitable ports .11 formed in the piston and compressed and discharged from the other cylinder through its valve 1.0.

- In ,order to prevent pounding of the piston, as in starting up the apparatus, or whenever there ,is .an equalization of pres-- 'sures on optposite sides of the inlet valves, we construe the outlet valve so that a comaratively slow escape of gas under pressure 1n cylinder 6 will take place intothe condenser 2. This cushioning eifect of the piston may be accomplished in a variety of acts against lthe spring .'12 infits casing, whereb the -valve is maintained normally closed indeplen'dent of suction or fluid pressure. As t der, its valve 10 opens, owing the ga's to escape into a. passageway 13 in the valve casing', the valve being forced a einst an opposed 4seat 14. From the chain r 13 the gas escapes through suitable ortsr' grooves 15 in the valve into .an annu ar'space It-formed Aby a turned-down portion of the valve.v Thence' the-gas' mayescape througlr a re.- stricted port 17 into the condenser receiv'e'l` 2. The size of the :ports 15-.1'7.is `suchthat an air cushion forthe piston' is formedl in the cylinder 6 at the same time suicient vapor Iwill be delivered to thej condenser receiver for -'refrigerant purposes.t From the condenser receiver 2 the condensed gas'and vapor 'asses throughy aj port orfconduit 18 the expansion chamber' being-regulated by suitable means, as the automatic'needle valve 19. This regulating valve `19 maybe operated by any .appropriate means.- As here showugl this valve .is carried-by a lever 20ffulcru'medat 2l and connected with a diaadjustable tension spring 23A in oppositionto the gas. pressure in the expansion lchamber. As thecondensed vapor escapes into chamber 3 it expands and asses on through the coil 4, ro ucing the esired degree of cold. From t e `coil 4 the expanded vapor returns to the compressprthrough a separate channel 24 formed in'part through shaft 5.

. Preferably Athe compressor revolves in a tank 25 containing' a. sufficient suppl of water for cooling' the compressor an re'- ceiver. by the .splash atprdedby the cylinders as they pass throught-hewater.l

the range of action of the `.freezing coil. 1'

Patented-Jan. 31 1911.

e gas i's com ressed in a cylin- A forme inshaft 5, tothe expansion chamber 3; the admissionof the-condensed `'vapor to phragm 22, )vhich latter is acted,on by an.

vThe evaporator and `expansion .colare` preferably contained naseparate :tank orA chamber, which'tankjlnayfcontain brine for freezing purposes, o r4 tlielair to' beclulledv x muy pass directly throughlthis ohamberinto-- In' operation, the device havingghgnf 1 charged with a suitable refrl etant liquid or;- vapor, the apparatus is revo ved atl-suitable ways. 'As here shown, the outlet' valve 10 y gw y c ossioio speed so that the pistonV will reciprocate twice at each revolution, byreason of the action of the Weight 8, alternately drawing into one cylinder 6 vapor to be compressed and condensed, and discharging the saine undericompression frointhe opposite cylinder .into the coil :2; the circulation taking place through the apparatus as previously.

described. The regulating valve 19 regulates'the pressure and the amount of liquid 'carried in the evaporator coil.

An apparatus of this sort is very simple to operate, and can be iiistalled' at small expenseyand is "particularly useful in small plant-s, factories, shops, or hotels desiring to produce their own ice, or do 'their own refrigerating. It is also 'valuable foruse on refrigerator cars, and the like.

Having thus described our inveiition,\vhat We claim and desire to secure by, Letters Patent is y1. A-rotary' compressor comprising a horizontally niounted casing having an ovoidal chamber,cylindei'sfixed tothe Casin and extending' 'radially tlieiefrom, a'- ouble bei" ,andha'ving its ends operating in opposed oylinders, inletaiid'outlet valvecon trolled passages in the pistons and cylinders, and a Weight Vtixed'to theipiston betweenits ends and inclosedby said chamber. 2. A rotary compressorcomprising a horizontally -inountedcasin'g having an ovoidal chamber, cylinders ltii'iedto' the casi and .extending radially therefrom, a ouble ended piston extending through said cham-- ber 'and having its ends .operating in Voplposed cylinders, inlet- .andoutlet valve-controlled passages in the pistons and cylinders, a weightriiiied to thepiston between its ends and inclosed by said chamber, and a liiu'id tanlrii1 \vliich thefcasing revolves, said cylindersadapted tol rotate 'thi'oughthe thiid of said tank and to be cooled thereby.-

A rotary compressor comprising a casing having trunnions on opposite sides'andf y upon which the casing is vertically revollible,

said casinghaving, also, an ovoidal chamber en ded piston' extending Vthroughsaid chamwith double `'opposed 'cylinders radiating therefrom, a single gravity-actuated double, ended piston traversing said chamber and operating in said cylinders, said piston having inletand outletassages; and a tank containing a cooling uid in which the cas- 'ing and cylinders are revoluble.

4. A rotary compressor comprising a cusing having .an ovoidal `chamber with double opposed e Enders-communicating with the interiore the casing, alsingle piston-inem-` ber common to both cylinders2 and a weigh-t on the piston .within the' casing to operate the piston, said, cylinders having inlet'and outlet passages. l

5.'A rota-ry compressor comprising a casing having an ovoidal chamber with double opposed cylinders conmiunicating with the interior of the easing, a single .'pstoiimember commonA to both cylinders',1anda Weight on the piston within the casingto operate the piston, said' cylinders havingnlet and outletf assages, and said inlet' passage for 'each cy inder being formedin' the piston and communicating \vit 1i.th'e f i'1 iterior of the casin 'Y Y '6. 4rotary compressorgiomprising a cas# interior of 'the casing',l j, a;gs ngle piston member' common to both pyliriiiers, a Weight on the 'piston within thegeasngto operate the let passageseand said inlet passage for cach cylinder being formati y ing having an ovoidal Withflonble :opposed Acylinders communicating with the in the. piston and communicating with ftl'ie interior o'f the' cas ing, Vand vavalve in the 4outlet passage for said cylinder 'A having"v means to cushion thcmover'nent of ,the piston inthe cylinder. 

